The investigation can begin once the president signs a proclamation and the investigation is gazetted.

"I am implementing an SIU investigation to look at all the reports since 2007. There are seven reports. Many of the recommendations have been resolved. But does it change the systematic process at Eskom," she said.

Brown wants a judge to head up the investigation, which will look at two PWC reports into the contracts between Eskom and the Gupta-owned Tegeta mine.